在对天然气脱硫脱碳溶液发泡原因分析的基础上，采用发泡管实验装置，以泡沫层高度h和消泡时间t为评价指标，对比分析了不同类型消泡剂的消泡能力，筛选出了合适消泡剂DF-2，并考察了消泡剂添加量、MDEA浓度、溶液温度、再生次数及FeS杂质含量等因素对DF-2消泡剂消泡性能的影响。实验结果表明，DF-2消泡剂可以有效预防天然气脱硫脱碳溶液的发泡现象，合适添加量为质量分数0.9‰；当醇胺溶液中MDEA体积分数为50%、溶液温度为30℃时，经过多次再生使用后，DF-2消泡剂仍然可以使胺液满足泡沫层高度h<5 cm、消泡时间t<10 s的行业标准；工业中试结果也证明，消泡剂DF-2可以有效预防MDEA醇胺溶液的发泡现象，有利于醇胺溶液早日实现工业化应用。

Based on analyzing the foaming reasons of desulfurization and decarbonization solution for natural gas,the defoaming abilities of different kinds of defoamers are compared and analyzed by means of a foaming pipe experimental device,with foam layer height h and defoaming time t as evaluating indicators.The defoamer DF-2 is selected out as the suitable defoamer.The influences of the dosage amount of defoamer,MDEA concentration,temperature of solution,times of regeneration and concentration of FeS impurity on the defoaming ability of DF-2 defoamer are investigated.The experimental results indicate that DF-2 defoamer can effectively prevent desulfurization and decarbonization solution for natural gas from foaming and its proper addition amount is 0.9 wt‰;DF-2 defoamer after repeated regeneration uses can still make the desulfurization and decarburization solution satisfy the industrial standards such as h<5 cm and t<10 s when the volume fraction of MDEA in solution is 50% and the solution temperature is at 30℃.Results of industrial pilot test shows that DF-2 defoamer can effectively prevent MDEA solution for natural gas from foaming,which will help MDEA solution to apply commercially soon.